【单选题】
Standard rate for a turning is______degrees per second. ___
A. 4
B. 6
C. 3
D. 2
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答案
C
解析
暂无解析
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Aircraft are required to comply with ATC instructions within______.___
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Amendments to the initial clearance will be issued at anytime an air traffic controller deems such action necessary to______.___
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【单选题】
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